ScrollViewInteraction.java example

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ganttproject-master
/*
GanttProject is an opensource project management tool. License: GPL3
Copyright (C) 2010 Dmitry Barashev

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 3
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package net.sourceforge.ganttproject.chart.mouse;

import java.awt.Component;
import java.awt.event.MouseEvent;

import net.sourceforge.ganttproject.ChartComponentBase;
import net.sourceforge.ganttproject.chart.ChartModelBase.ScrollingSession;

public class ScrollViewInteraction extends MouseInteractionBase implements MouseInteraction {
  private ScrollingSession myScrollingSession;
  private Component myComponent;

  public ScrollViewInteraction(MouseEvent e, TimelineFacade timelineFacade) {
    super(timelineFacade.getDateAt(0), timelineFacade);
    myComponent = e.getComponent();
    e.getComponent().setCursor(ChartComponentBase.CURSOR_DRAG);
    myScrollingSession = timelineFacade.createScrollingSession(e.getX(), e.getY());
  }

  @Override
  public void apply(MouseEvent event) {
    myScrollingSession.scrollTo(event.getX(), event.getY());
  }

  @Override
  public void finish() {
    myScrollingSession.finish();
    myComponent.setCursor(ChartComponentBase.DEFAULT_CURSOR);
  }
}